Best Gear Oil


Asked by Mar 23, 2016 at 11:46 AM about the 2003 Subaru Impreza 2.5 RS

Question type: Maintenance & Repair

Impreza 2.5 RS manual shift sound is coarse, so I
checked the gear oil (yellow dipstick on the left (if
you open the hood perspective) or right side of car)
and it was very low. So I won't drive it until I fill it
with gear oil. I'm at 122,000 miles.

My questions are:

1). what's the best gear oil to buy?
2). from where?
3). How much gear oil should I fill.

I heard Redline 75w90 is the way to go, but I
wanted to ask Gurus first. (I did try to look for a
thread on this here but maybe I didn't search the
right question. Any insight would be greatly

2 Answers


Don't waste your money under any circumstances, as the Subie stick trans (and diff) do NOT put much stress on the gear oil. So top it off with any 75 or 80 or 90W molasses and it'll be ok. If what you can see is pretty black maybe you should drain it first and then add the 5qts needed, as it's still an easy and cheap job. I've seen original gear oils last 10+ years in these, so don't sweat it. HOWEVER, if you run too long on very low gear oil you may pick up some noise that might NOT go away with a drain and refill. May still operate quite fine, though. Just save your money, as the higher temp capabilities of RedLine et al our completely wasted on this low temp app.

Best Answer

Thank you so much, so 5 quarts will do because I checked the yellow dipstick and there is ABSOLUTELY NO oil left. So I'll pour in the 5 quarts, right? I read somewhere that it needed 3.7L?

Your Answer

Add photo

Related Questions

  • Rear Differential gear oil change 2 answers

    '08 Subaru Imprezza Outback Sport Wagon w/ 50,000 mi. . How often does the rear differential oil need to be changed?

    2008 Subaru Impreza Outback Sport


    Maintenance & Repair

  • 2014 Impreza manual transmission, oil consumption & gear shift lock up? 4 answers

    Hello I think I may have posted this else where but here goes...I have a 2014 Impreza, manual transmission. Before my first oil change the light came on and I added a quart of oil. They said it was ...

    2014 Subaru Impreza 2.0i Hatchback


    Maintenance & Repair

  • urgent support please, otherwise i would sell her 16 answers

    hello alan, i don't know from where to start, but to cut it short on you, i have 3 main issues and unforunatly we have no experts here in egypt, i tried asking some experts over the internet, they ...

    1997 Subaru Impreza


    Maintenance & Repair

  • rear diff noise while turing, more a clunk sound. 6 answers

    car on jack stands, in drive no noise, stop right rear wheel and can hear and feel and hear a clunking, no noise while holding left rear wheel.

    1998 Subaru Impreza 4 Dr L AWD Wagon


    Maintenance & Repair

  • Clunking noise while turning only 8 answers

    Driving my 98 Subaru down the highway I hear no rear end noise or clunking, turn right or left hear and feel clunking. I put the car on jack stands, run in drive no noise, steer right or left no noise...

    Subaru Impreza



Search Subaru Impreza Questions

Subaru Impreza Experts

#1 FordNut
Reputation 480
#2 Nick Eidemiller
Nick Eidemiller
Reputation 420
#3 TheSubaruGuruBoston
Reputation 400
View All

Related Models For Sale

Used Subaru Impreza WRX"
44 Great Deals out of 1,322 listings starting at $2,500
Used Subaru Impreza WRX STi"
37 Great Deals out of 595 listings starting at $8,977
Used Subaru Outback"
417 Great Deals out of 29,732 listings starting at $1,295
Used Subaru Legacy"
234 Great Deals out of 17,826 listings starting at $1,295
Used Subaru Forester"
344 Great Deals out of 19,346 listings starting at $1,099
Used Honda Civic"
1,121 Great Deals out of 58,106 listings starting at $1,300
Used Mazda MAZDA3"
465 Great Deals out of 24,634 listings starting at $1,499
Used Mitsubishi Lancer Evolution"
21 Great Deals out of 796 listings starting at $15,500
Used BMW 3 Series"
1,629 Great Deals out of 39,405 listings starting at $888
Used Honda Accord"
1,269 Great Deals out of 77,638 listings starting at $1,395
Used Toyota Corolla"
1,435 Great Deals out of 66,812 listings starting at $1,295

Used Cars For Sale

2016 Subaru Impreza For Sale
3 Great Deals out of 3,301 listings starting at $16,975
2015 Subaru Impreza For Sale
32 Great Deals out of 622 listings starting at $12,999
2014 Subaru Impreza For Sale
32 Great Deals out of 750 listings starting at $11,900
2013 Subaru Impreza For Sale
70 Great Deals out of 1,151 listings starting at $7,931